Plural form of gonagium; a reproductive zooid or individual polyp in a colonial marine organism like a hydrozoan.
From New Latin gonagium, formed from gono- (Greek gonos 'reproduction') + -agium (Latin suffix forming nouns). Used in marine biology to describe specialized reproductive members of colonies.
In creatures like Portuguese man o'wars and many jellyfish relatives, different individuals in the colony have different jobs—some gonagia are entirely dedicated to making babies for the whole colony!
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